Machine for shaping metal can bodies



Dec. 18, 1934. M, M. SEDWICK MACHINE FOR SHAPING METAL CAN BODIES FiledJan. 12, 1931 5 Sheets-Sheet l Dec. 18, 1934. 5 w K MACHINE FOR SHAPINGMETAL CAN BODIES 5 Sheets-Sheet 2 Filed Jan. 12, 1931 Wax.) ./M

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M. M. SEDWICK MACHINE FOR SHAPING METAL CAN BODIES Filed Jan. 12, 1931 5Sheets-Sheet 3 gwuentoz JM 21/ KM Dec. 18, 1934. M. M. SEDWICK MACHINEFOR SHAPING METAL CAN BODIES Filed Jan. 12, 1931 5 Sheets-Sheet 4 MJWWKMDec. 18, 1934;

M. M. SEDWICK MACHINE FOR SHAPING METAL CAN BODIES Filed Jan. 12, 1931 5Sheets-Sheet 5 a5 F1913- fiat/M we, $4

Patented Dec. 18, 1934 i I MACHINE FOR SHAPING METAL CAN BODIESMatthew'M. Sedwick, Syracuse, N. Y., assignor to Continental CanCompany, Inc., New, York, N. Y., a corporation of New York ApplicationJanuary 12, 1931, Serial No. 508,347

19 Claims. (01. 153-32) The invention relates to new and useful im- Fig.6 is a detail in side view showing one secprovements in a machine forshaping can bodies. tion of the mandrel; In order to facilitate theshipping of can bodies Fig. 7 is a plan view of the same; constructed soas to form a cylindrical body, it Fig. 8 is a side View of the cam rodfor exis desirable to first form the bodies in a flatpanding themandrel; 5

tened elliptical shape so' that they can be placed Fig. 9 is a plan viewof the same; in a relatively small space for shipment. The V Fig. 10 isa side view of the can body as inpresent invention has to do with amachine for itially formed in its flat substantially elliptical theshaping of a can body initially formed so shape; 10 that it isrelatively flat in cross section, into Fig. 11 is an end view of thesame; 10 cylindrical form. -Fig. 12 is an end View of the can body afterAn object of the invention is toprovide a mait is expanded and before itis bumped; chine adapted to receive a can body which as Fig. 13 is anend view of the can body after it formed has a flattened ellipticalshape in cross has been expanded and bumped and is in its 15 section,and which is provided with means for final cylindrical shape, and I 15expanding said can body into cylindrical shape Fig. 14 is a side view ofthe can body in its and also with means for bumping the can body finalcylindrical shape. in the region of the side edges or elliptical ends Inorder to facilitate the shipping of can for shaping said body into atrue cylindrical bodies which, when formed into cans, are cylinform. Idrical, it has been desirable to initially construct 20 A further objectof the invention is to provide the can body in a flattened ellipticalshape in a machine of the above type wherein the can cross section. Thecan body is. bent or formed bodies are automatically placed on expandingintoa' flat cross sectional shape and the side mandrels, automaticallyshaped and bumped edges thereof are seamed together in the usual 9;.while on said mandrels and automatically dis a in r. he c n b d S0formed y be 5 charged from said mandrels after said body has placed onefiat on another, and thus the can been changed into cylindrical shape.bodies in large quantities can be stored in a com- A still furtherobject of the invention is to Da a v y $111,311 Space for Shipment Afterthe provide a machine of the above. type having a an body has been s ippd t the p a wh r plurality of mandrels movableintermittently to it is tobe used, th n it is Shaped into Cylindrical the station where the canbodies are placed form, flanged and the ends attached thereto. thereon,than to th bum ing tati n a d fi- The present invention has to do with amachine ngu t th discharge t ti n for shaping the initially formed fiatcan body T e and th r j t il i part be obvious into a cylindrical form.The machine includes 1 and will in part be hereinafter more fully dis-B4 ine intowhich the flat can bodies are closed. I placed and from whichthey are fed, one at a In the drawings which show by way of illustime,to the machine for shaping the same into tration one embodiment of theinvention cylindrical form; A turret mounted for rota- Figure 1 is aview partly in side elevation and tion about a horizontal axis isprovided with a an partly in section showing amachine embodying seriesof collapsible mandrels. A can body is 40 the improvements; slid on tothe mandrel, from the magazine, and Fig. 2 is a plan view of the machinewithparts whilev it is being loaded on to the mandrel, the broken awayto show portions of the expanding turret remains stationary. Then theturret is mandrels; rotated so as to bring the can body on the man- Fig.3 is an end view of the machine; drel tothe bumping station, and duringthe rota- 45 Fig. 4 is a view partly in section on the ,line tion of theturret, the mandrel is expanded so 4-4 of Fig. 1 showing more or lessdiagramas to change the flat can body into substantially matically theexpanding mandrels, the loading cylindrical form. In the region at theside edges station, the bumping station and the discharge of theflattened can body, the metal is slightly station; out of truecylindrical shape, and the can body 50 Fig. 5 is a view on the line 5-5of Fig. 4, is, therefore, brought to a bumping station, showingdiagrammatically the expanding manwherein bumping dies engage the canbody on drel and the stack holder for the can bodiesyalso the mandrel inthe region of the side edge porthe manner of loading the can body on tothe tions of the flattened can body, and during this mandrel; bumpingoperation, these portions are changed '55 into true cylindrical shapeconforming to the cylindrical shape of the designed can body.

The turret remains stationary while the can body is being bumped. Theturret then carries the mandrel to the discharge station and while it ismoving from the bumping staion to the discharge station, the mandrel iscollapsed so as to permit the can body to be readily removed therefrom,and itis automatically stripped from the mandrel anddischarged from themachine. Referring more in detail to the drawings, the

invention is shown as embodied in a machine which includes a supportingbed 1 in which. fa main operating shaft 2 is mounted. The shaft isdriven from a belt wheel 3 and is controlled by a suitable frictionclutch 4 which is shifted by a lever 5. A link 6 connected to the lever5 is also connected to a depending arm '7 on a rock shaft 8. The rockshaft 8 is provided with hand levers 9 and 10, one at each side of themachine. These levers are at the front oroperative end of the machine,so that the operator on a shaft 13 which is journaled in a bracket 14 atone end thereof and a bracket 15 at the other end thereof. Thesebrackets are carried by the supporting bed. The turret 11 is attached tothis sleeve 12 and rotates with the shaft. The shaft is intermittentlyrotated by means of a Geneva stop motion, which includes a wheel 16attached to the shaft and having radial slots therein in which a roller17 carried by a wheel 18 engages for turning the turret through one stopmotion. The turret is held from rotation by a locking wheel 19. carriedby astubshaft 20 to which is attached a gear 21. This gear 21 mesheswith a gear 22 on the main actuating shaft 2. This Geneva stop motionmay be of any desired form, the essential feature being that the turretshall be rotated through a certain angular motion and then be brought toa standstill where it held in fixed position while certain operationstake place in themachine. The machine as designed, has a Geneva stopmotion which rotates the turret through ninety degrees and then stopsthe turret.

, Mounted on the turret are a series of units for receiving andexpanding the can body into cylindrical form. The can body and thestepswhich it passes through in forming the same into cylindrical shapeis illustrated in Figures 10 to 14, inclusive. I The can body B, asshown in Figures 10 and 11, has a flattened elliptical shape in crosssection. The two side walls b and b are substantially fiat and parallel.The edges are joined in a side seam indicated at N. The side edgeportions of the can body, as indicated at b D are sharply rounded. Thecan body is made in the form shown in Figures 10 and 11, ona body makerwhich folds the blank about a shaping horn. The machine forms hooks atthe ends ofjthe'blank whichare interlocked, bumped together and finallysoldered so as to complete the, side seam. The can body thus formed isshipped to the place where the cans. are to be used. By making the canbodies in this form, they may be stacked fiat, one on another, and thusthe space occupied by the canbodies greatly reduced from that occupiedby a cylindrical can The wheels 18 and 19 are body. The can body thusshaped is placed on a mandrel which is expanded so as to form the bodyinto the shape illustrated in Fig. 12. The body walls I) and b aresubstantially cylindrical, as thus shaped, but the side edge portions b2) are still curved about a radius very much shorter than the radius ofthe cylindrical can body. The can body thus expanded, is thenpresentedto a bumping station, where dieeoperateupon the edge portions b b andform saidedge portions into a true cylindrical shape conforming to thecylindrical shape of the can body. The can body thusshapied is flangedand the ends attached in the usual manner. The finished cylindrical canbody is shown in edge view in Fig. 13,

and in side view in Fig. 14.

. holder to an expanding mandrel which forms a part of each shaping unitcarried by the turret.

There are four of these shaping units on the turret. Said shaping unitsare all similar in construction. Each shaping unit consists of two outersections of a mandrel 24 and 25. These sections are pivoted respectivelyat 26 and 27 to the turret. A pair of springs 28 engaging a pin 29 onthe section 24, and a pin 30 on the section 25, normally presses the twosections toward each other. Each section is provided with a tapered end31, and these two tapered ends, when in contact with each other, form acone-shaped entering end for directing the can body on to the mandrel.Each outer section is also provided with a roller 32 pivoted at 33, andso disposed in the outer section as to project slightly beyond the innerface of the section. The mandrel also is provided with a central section34. This central section 34 is provided with cam-shaped ends 35 and .36.The central section lies between the two outer sections, and when movedendwise be tween thesetwo sections, the cam faces 35 and 36 willengagetherollers 32 on the outer sections of the mandrel, 'and force saidsections outwardly. The central section 34 of the mandrel, and the outersections 24 and 25 are so shaped that when the central section 34 hasbeen moved to the left so as to expand the mandrel, as viewed in Fig. 1,produces a substantially cylindrical surface, conforming to theinner'cylindrical surfaceof the can body. I

The central section 34 of the mandrel is mounted so as toslide endwiseinsuitable guide blocks 39, 39. These guide blocks are provided withgrooves extending lengthwise thereof, and the mandrel section 34isprovided with ribs 40, 40 which engage these grooves in the blocks 39,39. The rollers 32 make contact with the cam faces 35 and 36, and thisgreatly facilitates the movement of'theexpanding section 340i themandrel. The inner end of the section34 of the mandrel is forked, and alink 41 is connected to a pin 42 passing through this forked end, andthus the linkis ,joined to the central mandrel section. This link 41,atits inner end, engages a crank pin 43 carried by an .arm 44. Mountedfor rotation with the turret is a sleeve 45 which is provided with fourradially projecting hubs. On each hub is a sleeve 46 and the arm 44 isattached to this sleeve 46. Also secured to the sleeve 46 is a bevelgear 47, which meshes with a fixed bevel gear 48 attached to the endbracket 14. The crank arms 44 are so timed that the central section ofthe mandrel is at the extreme end of its outer movement and the mandrelexpanded in the shaping unit at the upper side of Fig. 4. As

the turret rotates, the bevel gear 47 traveling on the stationary gear48 will causethe crank arm 44 to turn through an angle of one hundredand eighty degrees when the turret is moving from one stop position tothe next stop position, and therefore, when the shaping unit is in theposition indicated at the left in Fig. 4, the central section has movedinward to its inner extreme position and the'mandrel is collapsed orcontracted to the position shown in Fig. 5. As the turret moves throughanother angle of ninety degrees, the crank arm 44 is caused to rotatethrough an angle of one hundred and eighty degrees and bring the innersection to its extreme outer position,and the mandrel is fully expanded.Again, as the turret turns through an angle of ninety degrees'to theposition shown at the extreme right inFig. 4, the mandrel is collapsed.This is the discharge stationwhere the shaped can body is stripped fromthe mandrel while the station at the extreme left of Fig.4, is thestation where the fiat can body is forced on to the mandrel. The stationat the bottom position in Fig. 4, is the bumping station, and thestation at the top in Fig. 4, is the idle station.

The can bodies, as noted above, are placed in the stack holder 23. Thisstack holder is positioned so that the lower end thereof is directlyopposite the shaping unit at the left of Fig. 4. The turret comes to astandstill with the mandrel at this position, and the mandrel iscollapsed ready to receive a can body from the stack holder. The canbodies are stripped from the stack holder by a feed slide 49. This ,feedslide 49 is mounted in a bracket 50, so

that it can slide in a direction substantially in alinement with theaxis of the mandrel, and beneath the stack holder 23. The slide is movedback and forth by means of a shaft 51 which is mounted in a supportingbracket 52 carried by the frame of the machine, and this shaft isprovided with a gear 53 at its lower end which is provided with twospaced supporting and strip.

ping fingers 61 and 62. These fingers are bolted to the ends of the feedslide and each finger has a supporting face 63 which terminates in ashoulder 64 at its inner side. The can bodies in the stack rest on thesetwo fingers and a forward supporting finger 65. This forward supportingfinger, as shown in Fig. 2, is located directly in front of the mandreland serves to guide with certainty the can bodies stripped from thestack on to the tapered end of the mandrel. The supporting finger 65 iscarried by an arm 66 which is pivoted at 67. The forward end of the feedslide is cut away centrally thereof to provide a space for an upwardlyprojecting arm 68 formed as .a part of the arm 66. A spring 69 isattached to a pin 70 carried by the arm 68. The other end of this springengages a post '71 on the supporting bracket for the feed slide. Thisspring normally tends to lift the outer end of the arm 66 and thesupporting finger 65 carriedthereby.

A stop screw '72 carried by a bracket '73 is adapted to engage the pin70 and limitthe swinging movements of the arm 66. By adjusting this stopscrew, the outer end of the arm 66 maybe properly spaced so as to insurethe can body as it is stripped from the stack holder registering withthe mandrel and passing overthe tapered ends 31, 31 of the sections ofthe mandrel. The feed slide directly in rear of the shoulder 64 isslightly tapered and this shoulder is of sufiicient height so that itengages the end edge of the'lowermost canbody only. The next can body asit falls on to the upper face of the feed slide will be supportedthereby so that the stack is supported by the feed slide as thelowermost can body is being moved endwise on to the mandrel. As

the can body moves on to the mandrel, the

tapered end thereof will cause the can body to begin itsexpansion, andthe finger 65 can yield downwardly so as to permit the free movement ofthe can body on to the mandrel. Theside walls of the can body which isformed of elliptical shape and then flattened in storage, natue rallytend to spring away from each other, and therefore, as soon as the canbody is moved from beneath the stack, the side walls separate so as tofacilitate the entering of the wedge end of the. mandrels. After the canbody has been placed on the mandrels as indicated in Fig. 5, then theturret turns to an arc of ninety degrees, which brings the mandrelhaving received the can body to the bumping station. The mandrel as itpasses from the position shown atthe left in Fig. 4, to the positionshown at the bottom of Fig. 4, is expanded. This is due to the fact thatthe gear 4'7 traveling on the stationary gear moves the centralexpanding section of the mandrel. In dotted lines, the mandrel is shownas p'artly expanded, and the opening of the can body on its way fromthis station at the left of Fig. 4 to the station at the bottom of saidfigure.

. When the can body reaches the bumping station, then the edge portionsare bumped so as to form the body into a uniform cylindrical shape, asreferred to above. This is accomplished by two bumping dies '74 and '75.The bumping die 75 is carried by a rod '76 mounted for reciprocation inthe frame of the machine. Said die is detachably connected to the upperend of said rod '76. The lower end of the rod 76 is connected to aneccentric strap 77 by means of a pin '78. The eccentric strap is forked,and the pin passes through the forked ends and through the lower end ofthe rod 76. Mounted on the shaft 2 is an eccentric sleeve 79.Surrounding this eccentric sleeve 79 is a holding eccentric sleeve 80which is secured to the first-named eccentric sleeve by a bolt 81. Thebolt 81 passes through a slot in a flange 82 carried by the sleeve 80.An eccentric strap engages these eccentric sleeves which form theoperating eccentric for moving the rod 76 carrying the bumper. Byadjusting the sections of the sleeve, the extent of movement imparted tothe bumper in an upward direction towardthe mandrel can be varied. Thebumping die 74 is carried by a bracket arm 83. The bracket arm 83 isrigidly attached to a rod 84 mounted for vertical reciprocation insuitable bearings carried by the frame. This rod 84 is connected to aneccentric strap 85 cooperating with an eccentric 86 attached to theshaft 2. This eccentric is constructed for adjustment in a mannersimilar to that described in connection with the eccentric whichoperates the lower bumping die. The eccentrics are timed so that as thelower die moves'upward, the upper die moves downward. When the mandrelreaches the position between the bumpingdies, the side edges of thecentral sections 3.4 of the mandrel are in. alignment. with the bumping,and it is on this section that the edge portions of the can body-to bebumped are located. The bumping dies striking theend portions .ofthebodyforce the same. so as to cause the metal therein to conform to the shapeof the outer faces of the central section of .the mandrel. Thus itis'that the can'body bythe bumping or these side edge portionsis broughtinto a' true cylindrical form throughout. 1

After the can body has been bumped; the turret is then turnedthroughanother angle of ninety degrees, and while it is passing through this.angular movement, the mandrel is collapsed by the withdrawing of thecentral section. This releases the can body so that itfcan be readilystripped from the mandrel sections. In order that the can body may'bepositively stripped from the mandrel, a stripping means has beenprovided which includes a reciprocatingslideB'l mounted forreciprocating movement on a.

bracket 88. This slide is moved back and'iorth by means of alinkls9connected to apin: at-

tached tothe slide. The link 89 at its other end' is connected to acrank 91 which is carried-by a shaft 92 (see Fig. 2). The shaft '92 ismounted in a supporting sleeve bearing 93- and carries a bevel gear 94at its lowerend. This gear meshes with a'bevel gear 95 carried by thecross shaft55. i Attached to the inner end of the slide '87: are twowith the can body thereon is moving to the position atthe right in Fig;4. Thus itlis that the can body is carried between the hooks so that theinner'hook ends thereof overlie the inner edges of the shaped can body..While'the turret dwells: at this station, the slide. 87 is retracted,and the The same is The crank can stripped from the mandrel. true as tothe feeding-in station.

operating the feed slide is timed so that when."

the mandrel remains stationary at the :ieedingin station, the feed slidemoves forward: and places the can body onthe mandrel. When the can .bodyisiwithdrawnirom the mandrel, it is, dropped into a chute 98 and passesout of the machine. In order to protect the operator, the machine isprovided with a suitable closing covering 99 which also covers themandrels, and the operating parts fort-he feed slides are alsoshieldedand covered bythe supporting bracket therefor. There is: a hingecoverplate 100on top of the feed slideand also ahinge cover plate 101 it hasa substantially flattened elliptical shape in cross section. The canbodies are taken from the stack holder where they may be readily stackedin this flat condition, one at a time, and

placed onthe expanding mandrel, which as the turret carrying the samerotates, .is expanded to shapethe can bodyinto cylindricalform, Inasmuchas'the can body is formed in this flat condition, the metal between theside edge-portions thereof has notbeen bent beyond its elastic limit,and therefore, it is'smooth and unbroken.

The edge portions have, of course, been sharply ing' of the mandrelreadily shapes into cylindrical form all of the body portion betweenthese side edge portions which were sharply bent in the initial formingof the can body. The bumping dies engaging these edge portions will formtherein thetruecylindrical shape of the can body, and thus it is thatthe. can body is finally shaped into a cylindrical form which is of truecylindrical shape, smooth and 'freefrom flat sections throughout theentire extent thereof.

"While the machine is shown and described as intermittently operated andstopped while the loading of the can body on the mandrel takes place,and also while the can body is bumpedflt will be" understood that fromcertain aspects of the invention, the turret carrying the can bodies andthe mandrel, may biz continuously operated instead of intermittentlyoperated.

It is obvious that changes in the details of construction and thearrangement of the parts may be made without departing from the spiritof the invention as set forth in the'appended claims.- 3

Having thus described the invention, what I claim as new and desire tosecure by Letters- Patent, is

1. A machine for forming cylindrical can bodies comprising an expansiblemeans adapted to enter a can body or flat cross-sectional shape, meansfor operating said expansible means for expandingthe sidewalls of thecan body into cylindrical form in the region between the side edgeportions thereof, and reciprocating means for simultaneously bumping theside edge portions into the cylindrical form given said side walls.

2. A machine for forming cylindrical can bodies comprising a collapsiblemandrel adapted to enter a can'body of flat cross-sectional shape, meansforoperating said collapsible mandrel for expanding theside walls ofthecan body into cylindrical form in the region between the side edgeportions thereof, and reciprocating means for simultaneouslybumping theside edge portions while on the mandrel into the cylindrical form givensaidside walls.

3. A machine for forming cylindrical can bodies comprising an expansiblemeans adapted to enter a can body of flat cross-sectional shape, meansfor operating said expansible means for expanding the side walls of thecan body into cylindrical form in the region between the side edgeportions thereof, means for placing a can body on said expanding means,reciprocating means for simultaneouslybumping the side edge portionsinto the cylindricalform given the side walls, and means forstrippingthe can body from the expanding means.

4. A machine for forming cylindrical can bodi comprising-a collapsiblemandrel adapted to enter a can body of fiatcross-sectional shape,devices operating upon said mandrel for expanding the side walls of'thecan body into cylindrical form in the region between the side edgeportions thereof,'and reciprocating means for simultaneously bumping theside edge portions while on the mandrel into the cylindrical form giventhe side walls.

5. A machine for forming cylindrical can bodies comprising a rotatableturret, a series of shaping units carried thereby, each including anexpansible means adapted to enter a. can body of flat cross-sectionalshape, means for operating said expansible means for expanding the sidewalls of the can body into cylindrical form in the region between theside edge portions thereof, means for placing a can body on saidexpanding means, reciprocating means for simultaneously bumping the sideedge portions into the cylindrical form given the side walls, and meansfor stripping the formed cylindrical body from said expanding means. i a

6. A machine for forming cylindrical can bodies comprising arotatableturret, a series of shaping units carried by-said turret, meansfor rotating said turret intermittently, each shaping unit including anexpanding mandrehmeans for placing a can body of flat cross-sectionalshape on the expandingmandrel whereby said can body as the turretrotates can be expanded into cylindrical form in the region between theside edge portions thereof, reciprocatingmeans for simultaneouslybumping the side edge portions while said turret is at rest into thecylindrical form given said sidewalls, and means for stripping theformed cylindrical can body from said expanding means.

'7. A machine for forming cylindrical can bodies comprising a rotatableturret, means for rotating said turret intermittently, a seriesofshaping unitscarried by said turret, each shaping unit including amandrel having outer movable sections and an inner section adapted tomove between said outer sections for expanding the mandrel, and meansoperating during the rotation of theturret from one set position toanother for expanding said mandrelfor shaping a can body thereon and forcontracting said mandrel when the turret is moved to the next setposition whereby the can body is released.

8. A machine for forming cylindrical can bodies comprising a rotatableturret, means for rotating said turret intermittently, a series ofshaping units carried bysaid turret, each shaping unit including amandrel having outer movable sections'and an inner section adapted tomove be tween said outer sectionsfor expanding the mandrel, meansoperating during the rotation of the turret from oneset position toanother for expanding said mandrel for'shaping a can body thereon andfor contracting said mandrel when the turret is moved to the next setposition whereby the can body is released, and means for bumping theside edge portions of the can body while on the expanded mandrel.

9. A machine for forming cylindrical can bodies comprising a rotatableturret, means for rotating said turret intermittently, a series ofshaping units carried by said turret, each shaping unit including amandrel having outer movable sections and an inner section adapted tomove between said outer sections for expanding the mandrel, meansoperating during the rotation of the turret from one set position toanother for expanding said mandrel for shaping a can body thereon andfor contracting said mandrel when the turret is moved to the next setposition whereby the can body is released, means for feeding a can bodyon to said mandrel at the set position of the turret where the mandrelis collapsed, and means for removing the can body from the mandrel atthe set position where the mandrel is collapsed.

10. A machine for forming cylindrical can bodies comprising a rotatableturret, means for rotating said turret intermittently from one setposition to another, a series of shaping units carried by said turret, astack holder for can bodies of flat cross-sectional shape, means forfeeding a can body from the bottom of the stack endwise on to theshaping unit, said feeding means including a yielding finger forsupporting the end of the can body passing on to the shaping unit,

and an adjustable stop for determining the position of said supportingfinger; 11. A machine for forming cylindrical can bodies comprising arotatable turret, means for rotating said turret intermittently from oneset position to another, a series of shaping units carried by saidturret, a stack holder for can bodies of fiat cross-sectional shape,means for feedinga can body from the bottom of the stack endwise on tothe shaping unit, said feeding means including a feed slide havingspaced supporting fingers, each of which is provided with a shoulder forstripping the lowermost can body from the stack, a yielding finger forsupporting the end of-the can body to be passed on to the shaping unit,and a stop associated with said yielding finger for determining the setposition thereof whereby the can body may be alined for movement'on tothe shaping unit.

12. A machine for forming cylindrical can bodies comprising a rotatableturret, means for intermittently rotating said turret from one setposition to another, a series of shaping units car'- ried by saidturret, each including a mandrel, each mandrel having outer sectionspivotally supported and yieldingly moved into contact with each other,the free ends of said sections being tapered to form a cone-shapedenteringend, 'on to which a can body of flat cross-sectional shape maybe passed, said mandrel having a movable central section with cam facesat the forward end thereof adapted to pass between said outer sectionsfor moving said outer sections away from each other, and thus expandingthe mandrel, said mandrel, when expanded, being substantiallycylindrical in form whereby the flattened can body may be expanded intosubstantially. cylin drical form.

13. A machine for forming cylindrical can bodies comprising a rotatableturret, means for intermittently rotating said turret from one setposition to another, a series of shaping units car ried by said turret,each including a mandrel, each mandrel having outer sections pivotallysupported and yieldingly moved into contact with each other, the freeends of said sections being tapered to form a cone-shaped entering end,on to which a can body of fiat cross-sectional shape may be passed, saidmandrel having a movable central section with cam faces at the forwardend thereof adapted to pass between said outer sections for moving theouter sections away from each other, and thus expanding the mandrel,said mandrel, when expanded, being substantially cylindrical in formwhereby the flattened can body may be expanded into substantiallycylindrical form, and a bumping means adapted to engage the side edgeportions of the can body on the expanded mandrel for giving to the canbody a uniform cylindrical shape.

14. A machine for forming cylindrical can bodies comprising a rotatableturret, means for intermittently rotating said turret from one setposition to another, a series of shaping units carried by said turret,each including a mandrel, each mandrel having outer sections pivotallysupported and yieldingly moved into contact with each other, the freeends of said sections being tapered to form a cone-shaped entering end,on to which a can body of flat cross-sectional shape may be passed, saidmandrel having a movable central section with cam faces at the forwardend thereof adapted to pass between said outer sections for moving saidouter sections away from each other, and thus expanding the mandrel,said mandrel,

when. expanded, being substantially cylindrical in form whereby theflattened canbody may be expanded into substantially cylindrical form, acrank associated with-eaeh shaping hav n a connection to the centralsection of theme-n drel," and means operatedmy the rotation. of? theturret for rotating saidcrank for expanding contracting the mandrel. I

:15: A machine .for forming cylindrical can comprising a rotatableturret, means for imparting an intermittent step by step rotation tosaid turret,a series ofexpanding-mandrelscarried by said turretand'adapted to receive a can body of fiat-cmss-secticnal shape forexpanding the of the can body into cylindrical formin the region betweenthe side edge portions thereof, and a bumping means including opposedbumping dies'adapted to simultaneously engage the side edge portions forbumping the 5311182111111 the cylindrical form given saidside walls; I16; A machine for forming cylindrical can bodies comprising a rotatableturret, means for imparting an intermittent step by step rotation tosaid turret, aseries of expanding mandrelscarried by saidturret andadapted toi'eceive' a can body of fiat cross-sectional shape forexpanding the side. walls of the can body into cylindrical form inv theregion between. the side edge portions thereof, a bumping meansincluding opposed bumping dies adapted to simultaneously engage theside. edge portionsfor bumpingthe same into the cylindrical form givensaid side walls, a rod carrying each dumping die, an eccentric strapconnected. to each rod, and an eccentric associatcd witheach strap forsimultaneously moving said bumping dies into engagement with the canbody. v

17. A machine for forming cylindrical can bodies comprising a rotatableturret, means for imparting an intermittent stepby step rotation to saidturret,.a series of expanding mandrels carried by said'turret andadapted to receive a can body of flat cross-sectional for, expanding"the side walls-of the'can body into cylindrical form in the regionbetween: the side ti-onsthereof; a bumping .meansincludlnznppoaedbumping dies adapted to simultaneously engage the side edge portions forbumping the same into the cylindrical form givensaid side wallsa rodcarrying each bumping die, an eccentric strap connected to-each rod, aneccentric associated with each strap. for simultaneously movingjsaidbumping dies into engagement with the canbody, and means whereby thethrow of the-eccentrics may be varied:- for' varying; theworkingwpcsition of the bumping'dies:

18. A machine for forming cylindrical can bodies comprising a rotatableturret, means for intermittently rotating said turretfrom one setposition to another, a series of; shaping units carried by said turret,means for placingcan bodies on theshaping units, and meansforxstrippingthe can'bodies from the shaping unite including a stripping slide,spaced strippinghooks carried thereby and disposed. and timed. so thatthe can body is carried between said stripping hooks for engagementthereby when the turret reaches a set position for dischargirg the-canbody L V l 19'. A machine for forming cylindrical can bodies comprisinga rotatableturreanieans for intermittently rotating saidpturret from oneset position to another, a series of collapsible mandrels carried bysaid turret, means for expanding andcontracting said mandrels duringtherotation of said turret. from one set position to another, means forplacing a can body of flat cross-sectional. shape on the expandingmandrel while at one set position, means for bumpingthe side edgeportionsof the: can body-into the cylindrical. form-given the side wallsat another set position of the turret, and means for stripping theshaped can bodyfrom thecollapsedmandrelat another set position ofsaidrotatable turret;

MATTHEW M. SEDWICK.

